bnx2x: Adding XAUI CL73 autoneg support

Adding CL73 support to the built in PHY in the 5771x device. Also supporting
fallbacks to CL73 if the link partner does not respond.

Signed-off-by: Yaniv Rosner <yanivr@broadcom.com>
Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 180 insertions, 30 deletions

diff --git a/drivers/net/bnx2x_link.c b/drivers/net/bnx2x_link.c
index db4f3c057a19..371310db2eba 100644
--- a/drivers/net/bnx2x_link.c
+++ b/drivers/net/bnx2x_link.c
@@ -1151,7 +1151,8 @@ static void bnx2x_set_parallel_detection(struct link_params *params,
 }
 
 static void bnx2x_set_autoneg(struct link_params *params,
-                            struct link_vars   *vars)
+                            struct link_vars *vars,
+                            u8 enable_cl73)
 {
         struct bnx2x *bp = params->bp;
         u16 reg_val;
@@ -1181,7 +1182,9 @@ static void bnx2x_set_autoneg(struct link_params *params,
                               params->phy_addr,
                               MDIO_REG_BANK_SERDES_DIGITAL,
                               MDIO_SERDES_DIGITAL_A_1000X_CONTROL1, &reg_val);
-        reg_val &= ~MDIO_SERDES_DIGITAL_A_1000X_CONTROL1_SIGNAL_DETECT_EN;
+        reg_val &= ~(MDIO_SERDES_DIGITAL_A_1000X_CONTROL1_SIGNAL_DETECT_EN |
+                    MDIO_SERDES_DIGITAL_A_1000X_CONTROL1_INVERT_SIGNAL_DETECT);
+        reg_val |= MDIO_SERDES_DIGITAL_A_1000X_CONTROL1_FIBER_MODE;
         if (vars->line_speed == SPEED_AUTO_NEG)
                 reg_val |= MDIO_SERDES_DIGITAL_A_1000X_CONTROL1_AUTODET;
         else
@@ -1213,8 +1216,51 @@ static void bnx2x_set_autoneg(struct link_params *params,
                               MDIO_BAM_NEXT_PAGE_MP5_NEXT_PAGE_CTRL,
                               reg_val);
 
-        /* CL73 Autoneg Disabled */
-        reg_val = 0;
+        if (enable_cl73) {
+                /* Enable Cl73 FSM status bits */
+                CL45_WR_OVER_CL22(bp, params->port,
+                                      params->phy_addr,
+                                      MDIO_REG_BANK_CL73_USERB0,
+                                    MDIO_CL73_USERB0_CL73_UCTRL,
+                                    MDIO_CL73_USERB0_CL73_UCTRL_USTAT1_MUXSEL);
+
+                /* Enable BAM Station Manager*/
+                CL45_WR_OVER_CL22(bp, params->port,
+                        params->phy_addr,
+                        MDIO_REG_BANK_CL73_USERB0,
+                        MDIO_CL73_USERB0_CL73_BAM_CTRL1,
+                        MDIO_CL73_USERB0_CL73_BAM_CTRL1_BAM_EN |
+                        MDIO_CL73_USERB0_CL73_BAM_CTRL1_BAM_STATION_MNGR_EN |
+                        MDIO_CL73_USERB0_CL73_BAM_CTRL1_BAM_NP_AFTER_BP_EN);
+
+                /* Merge CL73 and CL37 aneg resolution */
+                CL45_RD_OVER_CL22(bp, params->port,
+                                      params->phy_addr,
+                                      MDIO_REG_BANK_CL73_USERB0,
+                                      MDIO_CL73_USERB0_CL73_BAM_CTRL3,
+                                      &reg_val);
+
+                if (params->speed_cap_mask &
+                    PORT_HW_CFG_SPEED_CAPABILITY_D0_10G) {
+                        /* Set the CL73 AN speed */
+                        CL45_RD_OVER_CL22(bp, params->port,
+                                              params->phy_addr,
+                                              MDIO_REG_BANK_CL73_IEEEB1,
+                                              MDIO_CL73_IEEEB1_AN_ADV2,
+                                              &reg_val);
+
+                        CL45_WR_OVER_CL22(bp, params->port,
+                                              params->phy_addr,
+                                              MDIO_REG_BANK_CL73_IEEEB1,
+                                              MDIO_CL73_IEEEB1_AN_ADV2,
+                          reg_val | MDIO_CL73_IEEEB1_AN_ADV2_ADVR_10G_KX4);
+
+                }
+                /* CL73 Autoneg Enabled */
+                reg_val = MDIO_CL73_IEEEB0_CL73_AN_CONTROL_AN_EN;
+
+        } else /* CL73 Autoneg Disabled */
+                reg_val = 0;
 
         CL45_WR_OVER_CL22(bp, params->port,
                               params->phy_addr,
@@ -1297,7 +1343,7 @@ static void bnx2x_set_brcm_cl37_advertisment(struct link_params *params)
         CL45_WR_OVER_CL22(bp, params->port,
                               params->phy_addr,
                               MDIO_REG_BANK_OVER_1G,
-                              MDIO_OVER_1G_UP3, 0);
+                              MDIO_OVER_1G_UP3, 0x400);
 }
 
 static void bnx2x_calc_ieee_aneg_adv(struct link_params *params, u32 *ieee_fc)
@@ -1345,28 +1391,46 @@ static void bnx2x_set_ieee_aneg_advertisment(struct link_params *params,
                               MDIO_COMBO_IEEE0_AUTO_NEG_ADV, (u16)ieee_fc);
 }
 
-static void bnx2x_restart_autoneg(struct link_params *params)
+static void bnx2x_restart_autoneg(struct link_params *params, u8 enable_cl73)
 {
         struct bnx2x *bp = params->bp;
         u16 mii_control;
+
         DP(NETIF_MSG_LINK, "bnx2x_restart_autoneg\n");
         /* Enable and restart BAM/CL37 aneg */
 
-        CL45_RD_OVER_CL22(bp, params->port,
-                              params->phy_addr,
-                              MDIO_REG_BANK_COMBO_IEEE0,
-                              MDIO_COMBO_IEEE0_MII_CONTROL,
-                              &mii_control);
-        DP(NETIF_MSG_LINK,
-                 "bnx2x_restart_autoneg mii_control before = 0x%x\n",
-                 mii_control);
-        CL45_WR_OVER_CL22(bp, params->port,
-                              params->phy_addr,
-                              MDIO_REG_BANK_COMBO_IEEE0,
-                              MDIO_COMBO_IEEE0_MII_CONTROL,
-                              (mii_control |
-                               MDIO_COMBO_IEEO_MII_CONTROL_AN_EN |
-                               MDIO_COMBO_IEEO_MII_CONTROL_RESTART_AN));
+        if (enable_cl73) {
+                CL45_RD_OVER_CL22(bp, params->port,
+                                      params->phy_addr,
+                                      MDIO_REG_BANK_CL73_IEEEB0,
+                                      MDIO_CL73_IEEEB0_CL73_AN_CONTROL,
+                                      &mii_control);
+
+                CL45_WR_OVER_CL22(bp, params->port,
+                                params->phy_addr,
+                                MDIO_REG_BANK_CL73_IEEEB0,
+                                MDIO_CL73_IEEEB0_CL73_AN_CONTROL,
+                                (mii_control |
+                                MDIO_CL73_IEEEB0_CL73_AN_CONTROL_AN_EN |
+                                MDIO_CL73_IEEEB0_CL73_AN_CONTROL_RESTART_AN));
+        } else {
+
+                CL45_RD_OVER_CL22(bp, params->port,
+                                      params->phy_addr,
+                                      MDIO_REG_BANK_COMBO_IEEE0,
+                                      MDIO_COMBO_IEEE0_MII_CONTROL,
+                                      &mii_control);
+                DP(NETIF_MSG_LINK,
+                         "bnx2x_restart_autoneg mii_control before = 0x%x\n",
+                         mii_control);
+                CL45_WR_OVER_CL22(bp, params->port,
+                                      params->phy_addr,
+                                      MDIO_REG_BANK_COMBO_IEEE0,
+                                      MDIO_COMBO_IEEE0_MII_CONTROL,
+                                      (mii_control |
+                                       MDIO_COMBO_IEEO_MII_CONTROL_AN_EN |
+                                       MDIO_COMBO_IEEO_MII_CONTROL_RESTART_AN));
+        }
 }
 
 static void bnx2x_initialize_sgmii_process(struct link_params *params,
@@ -1438,7 +1502,7 @@ static void bnx2x_initialize_sgmii_process(struct link_params *params,
 
         } else { /* AN mode */
                 /* enable and restart AN */
-                bnx2x_restart_autoneg(params);
+                bnx2x_restart_autoneg(params, 0);
         }
 }
 
@@ -1591,7 +1655,73 @@ static void bnx2x_flow_ctrl_resolve(struct link_params *params,
         DP(NETIF_MSG_LINK, "flow_ctrl 0x%x\n", vars->flow_ctrl);
 }
 
-
+static void bnx2x_check_fallback_to_cl37(struct link_params *params)
+{
+        struct bnx2x *bp = params->bp;
+        u16 rx_status, ustat_val, cl37_fsm_recieved;
+        DP(NETIF_MSG_LINK, "bnx2x_check_fallback_to_cl37\n");
+        /* Step 1: Make sure signal is detected */
+        CL45_RD_OVER_CL22(bp, params->port,
+                              params->phy_addr,
+                              MDIO_REG_BANK_RX0,
+                              MDIO_RX0_RX_STATUS,
+                              &rx_status);
+        if ((rx_status & MDIO_RX0_RX_STATUS_SIGDET) !=
+            (MDIO_RX0_RX_STATUS_SIGDET)) {
+                DP(NETIF_MSG_LINK, "Signal is not detected. Restoring CL73."
+                             "rx_status(0x80b0) = 0x%x\n", rx_status);
+                CL45_WR_OVER_CL22(bp, params->port,
+                                      params->phy_addr,
+                                      MDIO_REG_BANK_CL73_IEEEB0,
+                                      MDIO_CL73_IEEEB0_CL73_AN_CONTROL,
+                                      MDIO_CL73_IEEEB0_CL73_AN_CONTROL_AN_EN);
+                return;
+        }
+        /* Step 2: Check CL73 state machine */
+        CL45_RD_OVER_CL22(bp, params->port,
+                              params->phy_addr,
+                              MDIO_REG_BANK_CL73_USERB0,
+                              MDIO_CL73_USERB0_CL73_USTAT1,
+                              &ustat_val);
+        if ((ustat_val &
+             (MDIO_CL73_USERB0_CL73_USTAT1_LINK_STATUS_CHECK |
+              MDIO_CL73_USERB0_CL73_USTAT1_AN_GOOD_CHECK_BAM37)) !=
+            (MDIO_CL73_USERB0_CL73_USTAT1_LINK_STATUS_CHECK |
+              MDIO_CL73_USERB0_CL73_USTAT1_AN_GOOD_CHECK_BAM37)) {
+                DP(NETIF_MSG_LINK, "CL73 state-machine is not stable. "
+                             "ustat_val(0x8371) = 0x%x\n", ustat_val);
+                return;
+        }
+        /* Step 3: Check CL37 Message Pages received to indicate LP
+        supports only CL37 */
+        CL45_RD_OVER_CL22(bp, params->port,
+                              params->phy_addr,
+                              MDIO_REG_BANK_REMOTE_PHY,
+                              MDIO_REMOTE_PHY_MISC_RX_STATUS,
+                              &cl37_fsm_recieved);
+        if ((cl37_fsm_recieved &
+             (MDIO_REMOTE_PHY_MISC_RX_STATUS_CL37_FSM_RECEIVED_OVER1G_MSG |
+             MDIO_REMOTE_PHY_MISC_RX_STATUS_CL37_FSM_RECEIVED_BRCM_OUI_MSG)) !=
+            (MDIO_REMOTE_PHY_MISC_RX_STATUS_CL37_FSM_RECEIVED_OVER1G_MSG |
+              MDIO_REMOTE_PHY_MISC_RX_STATUS_CL37_FSM_RECEIVED_BRCM_OUI_MSG)) {
+                DP(NETIF_MSG_LINK, "No CL37 FSM were received. "
+                             "misc_rx_status(0x8330) = 0x%x\n",
+                         cl37_fsm_recieved);
+                return;
+        }
+        /* The combined cl37/cl73 fsm state information indicating that we are
+        connected to a device which does not support cl73, but does support
+        cl37 BAM. In this case we disable cl73 and restart cl37 auto-neg */
+        /* Disable CL73 */
+        CL45_WR_OVER_CL22(bp, params->port,
+                              params->phy_addr,
+                              MDIO_REG_BANK_CL73_IEEEB0,
+                              MDIO_CL73_IEEEB0_CL73_AN_CONTROL,
+                              0);
+        /* Restart CL37 autoneg */
+        bnx2x_restart_autoneg(params, 0);
+        DP(NETIF_MSG_LINK, "Disabling CL73, and restarting CL37 autoneg\n");
+}
 static u8 bnx2x_link_settings_status(struct link_params *params,
                                    struct link_vars *vars,
                                    u32 gp_status,
@@ -1755,6 +1885,13 @@ static u8 bnx2x_link_settings_status(struct link_params *params,
                 vars->flow_ctrl = BNX2X_FLOW_CTRL_NONE;
                 vars->autoneg = AUTO_NEG_DISABLED;
                 vars->mac_type = MAC_TYPE_NONE;
+
+                if ((params->req_line_speed == SPEED_AUTO_NEG) &&
+                    ((XGXS_EXT_PHY_TYPE(params->ext_phy_config) ==
+                     PORT_HW_CFG_XGXS_EXT_PHY_TYPE_DIRECT))) {
+                        /* Check signal is detected */
+                        bnx2x_check_fallback_to_cl37(params);
+                }
         }
 
         DP(NETIF_MSG_LINK, "gp_status 0x%x  phy_link_up %x line_speed %x \n",
@@ -3425,7 +3562,8 @@ static void bnx2x_8481_set_10G_led_mode(struct link_params *params,
 
 
 static void bnx2x_init_internal_phy(struct link_params *params,
-                                struct link_vars *vars)
+                                  struct link_vars *vars,
+                                  u8 enable_cl73)
 {
         struct bnx2x *bp = params->bp;
         if (!(vars->phy_flags & PHY_SGMII_FLAG)) {
@@ -3440,7 +3578,7 @@ static void bnx2x_init_internal_phy(struct link_params *params,
                         DP(NETIF_MSG_LINK, "not SGMII, no AN\n");
 
                         /* disable autoneg */
-                        bnx2x_set_autoneg(params, vars);
+                        bnx2x_set_autoneg(params, vars, 0);
 
                         /* program speed and duplex */
                         bnx2x_program_serdes(params, vars);
@@ -3456,10 +3594,10 @@ static void bnx2x_init_internal_phy(struct link_params *params,
                                                        vars->ieee_fc);
 
                         /* enable autoneg */
-                        bnx2x_set_autoneg(params, vars);
+                        bnx2x_set_autoneg(params, vars, enable_cl73);
 
                         /* enable and restart AN */
-                        bnx2x_restart_autoneg(params);
+                        bnx2x_restart_autoneg(params, enable_cl73);
                 }
 
         } else { /* SGMII mode */
@@ -5815,11 +5953,10 @@ static u8 bnx2x_link_initialize(struct link_params *params,
         if (non_ext_phy ||
             (ext_phy_type == PORT_HW_CFG_XGXS_EXT_PHY_TYPE_BCM8705) ||
             (ext_phy_type == PORT_HW_CFG_XGXS_EXT_PHY_TYPE_BCM8726) ||
-            (ext_phy_type == PORT_HW_CFG_XGXS_EXT_PHY_TYPE_BCM8481) ||
             (params->loopback_mode == LOOPBACK_EXT_PHY)) {
                 if (params->req_line_speed == SPEED_AUTO_NEG)
                         bnx2x_set_parallel_detection(params, vars->phy_flags);
-                bnx2x_init_internal_phy(params, vars);
+                bnx2x_init_internal_phy(params, vars, non_ext_phy);
         }
 
         if (!non_ext_phy)
@@ -6296,7 +6433,7 @@ u8 bnx2x_link_update(struct link_params *params, struct link_vars *vars)
             (ext_phy_type != PORT_HW_CFG_XGXS_EXT_PHY_TYPE_BCM8705) &&
             (ext_phy_type != PORT_HW_CFG_XGXS_EXT_PHY_TYPE_BCM8726) &&
             (ext_phy_link_up && !vars->phy_link_up))
-                bnx2x_init_internal_phy(params, vars);
+                bnx2x_init_internal_phy(params, vars, 0);
 
         /* link is up only if both local phy and external phy are up */
         vars->link_up = (ext_phy_link_up && vars->phy_link_up);
diff --git a/drivers/net/bnx2x_reg.h b/drivers/net/bnx2x_reg.h
index 9a20da5bf19a..999838629be3 100644
--- a/drivers/net/bnx2x_reg.h
+++ b/drivers/net/bnx2x_reg.h
@@ -5596,6 +5596,9 @@
 #define MDIO_CL73_IEEEB1_AN_ADV2_ADVR_10G_KR            0x0080
 
 #define MDIO_REG_BANK_RX0                               0x80b0
+#define MDIO_RX0_RX_STATUS                              0x10
+#define MDIO_RX0_RX_STATUS_SIGDET                       0x8000
+#define MDIO_RX0_RX_STATUS_RX_SEQ_DONE                  0x1000
 #define MDIO_RX0_RX_EQ_BOOST                            0x1c
 #define MDIO_RX0_RX_EQ_BOOST_EQUALIZER_CTRL_MASK        0x7
 #define MDIO_RX0_RX_EQ_BOOST_OFFSET_CTRL                0x10
@@ -5789,12 +5792,22 @@
 #define MDIO_OVER_1G_LP_UP2_PREEMPHASIS_SHIFT                           7
 #define MDIO_OVER_1G_LP_UP3                                             0x1E
 
+#define MDIO_REG_BANK_REMOTE_PHY                        0x8330
+#define MDIO_REMOTE_PHY_MISC_RX_STATUS                          0x10
+#define MDIO_REMOTE_PHY_MISC_RX_STATUS_CL37_FSM_RECEIVED_OVER1G_MSG     0x0010
+#define MDIO_REMOTE_PHY_MISC_RX_STATUS_CL37_FSM_RECEIVED_BRCM_OUI_MSG   0x0600
+
 #define MDIO_REG_BANK_BAM_NEXT_PAGE                     0x8350
 #define MDIO_BAM_NEXT_PAGE_MP5_NEXT_PAGE_CTRL                   0x10
 #define MDIO_BAM_NEXT_PAGE_MP5_NEXT_PAGE_CTRL_BAM_MODE                  0x0001
 #define MDIO_BAM_NEXT_PAGE_MP5_NEXT_PAGE_CTRL_TETON_AN                  0x0002
 
 #define MDIO_REG_BANK_CL73_USERB0               0x8370
+#define MDIO_CL73_USERB0_CL73_UCTRL                             0x10
+#define MDIO_CL73_USERB0_CL73_UCTRL_USTAT1_MUXSEL                       0x0002
+#define MDIO_CL73_USERB0_CL73_USTAT1                            0x11
+#define MDIO_CL73_USERB0_CL73_USTAT1_LINK_STATUS_CHECK                  0x0100
+#define MDIO_CL73_USERB0_CL73_USTAT1_AN_GOOD_CHECK_BAM37                0x0400
 #define MDIO_CL73_USERB0_CL73_BAM_CTRL1                         0x12
 #define MDIO_CL73_USERB0_CL73_BAM_CTRL1_BAM_EN                          0x8000
 #define MDIO_CL73_USERB0_CL73_BAM_CTRL1_BAM_STATION_MNGR_EN             0x4000